Instead you might try a sharp or refined infusion (compare both to see what provides most damage), and then additionally boost damage with a resin. That, or go respec into INT and FAI while just retaining enough STR/DEX to heft your favourite weapons, and infuse everything with chaos/dark. If you really want optimal one shot damage then Lloyd's
Broadly speaking, you may want to fight up close, from a distance or combine the two. If you're a brawler, choose a Knight. If you prefer to fight from a distance, choose a Sorcerer.
For Dark Souls III on the PlayStation 4, a GameFAQs message board topic titled "'DkS1 was just a backstab fest'". You need it for the second and third endings. Firekeeper SOUL. The soul is for healing the dark sigil, if you want to cancel hollowing permanently, but ruin Yuria's questline and the Ursurpation ending. The End of Fire and Betraying the Firekeeper endings require the Firekeeper EYES, which you get from Dark Firelink after Champ Gundyr.